Displaying only used categories in filter

[apos37]

Is it possible to hide categories from the listings search page filter where there are no listings with those categories yet? It is annoying to try to filter a category and find nothing until there is a listing added that uses it.

[apos37]

Nevermind, I figured it out:

For listings:

add_filter( 'hivepress/v1/forms/listing_filter', function( $form ) {
    $categories = $form[ 'fields' ][ '_category' ][ 'options' ];
    foreach ( $categories as $term_id => $category ) {
        if ( $term_id == 0 ) {
            continue;
        }
        $term = get_term( $term_id, 'hp_listing_category' );
        $count = $term->count;
        if ( $count == 0 ) {
            unset( $form[ 'fields' ][ '_category' ][ 'options' ][ $term_id ] );
        }
    }
    return $form;
}, 1000 );

And for vendors:

add_filter( 'hivepress/v1/forms/vendor_filter', function( $form ) {
    $categories = $form[ 'fields' ][ '_category' ][ 'options' ];
    foreach ( $categories as $term_id => $category ) {
        if ( $term_id == 0 ) {
            continue;
        }
        $args = [
            'post_type'      => 'hp_vendor',
            'post_status'    => 'publish',
            'posts_per_page' => -1,
            'tax_query'      => [
                  'relation'     => 'AND',
                  [
                      'taxonomy'   => 'hp_vendor_category',
                      'field'      => 'id',
                      'terms'      => [ $term_id ]
                  ]
            ]
        ];
        $query = new WP_Query( $args );
        $count = (int)$query->post_count;
        wp_reset_postdata();

        if ( $count == 0 ) {
            unset( $form[ 'fields' ][ '_category' ][ 'options' ][ $term_id ] );
        }
    }
    return $form;
}, 1000 );